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02 SOF question

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Old Jan 24, 2020 | 02:04 PM
  #1  
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1Perry58
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5th Wheeling
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From: Colorado
02 SOF question

I have a 2002 F-350 CCLB 7.3L that has a SOF issue. I don't want to just start throwing parts at it
The actuator motor doesn't move when the switch is changed from 2WD to 4WD high or low.
so far I checked the fuses 17, 19, 28 they are good (wrong size) I don't know which relays ( maybe 40, 41, 42) don't know where to look for them
don't do well trouble shooting electrical problems
I will check the continuity on the back of the switch to see if it is making a circuit thru from ground to each position in the next few minutes and post the results
if anyone has any other suggestions I will appreciate it
Thanks in advance for any and all help!!!
 
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Old Jan 25, 2020 | 07:46 AM
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What's a SOF.?
 
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Old Jan 25, 2020 | 11:01 AM
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shift on the fly
its the type that is electronic
 
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Old Jan 25, 2020 | 05:02 PM
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OH! I get it! S=shift O=ON! and F= Fly ok sorry about that. Any luck with it yet? Well, just seat of the pants having never been there and done that , can you get someone to work the switchj while you get under the truck with a voltmeter? It has to have a relay somewhere also I guess I would go there next.
 
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Old Jan 25, 2020 | 06:18 PM
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5th Wheeling
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So far I have no voltage at the actuator and no voltage at the switch? kinda confused
 
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Old Jan 26, 2020 | 11:53 AM
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Without seeing a wiring diagram I don't know how to advise. You have to find where supply voltage comes from.
 
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